[OSM-dev] Altitude data & (cycle) route profiles

Andy Allan gravitystorm at gmail.com
Sun Apr 6 15:12:17 BST 2008

On Sun, Apr 6, 2008 at 2:43 PM, Sjors Provoost <sjors at sprovoost.nl> wrote:
>  I was thinking about entering as a user with a name like 'SRTM-bot',


I urge you as strongly as I can - please DO NOT put SRTM-derived
height data into the OSM database.

>  One solution I can think of is to automatically recalculate the
>  altitude of a moved node

This surely underlines that there is no benefit to having the SRTM
data in the OSM database. If an application needs to know the
SRTM-derived height of the nodes, it should calculate it as and when
it needs to. You appear to have forgotten or not taken into account
that there are many different algorithms for calculating the height of
a given point from SRTM, and there is nothing to say that whichever
algorithm you use will be the best.

>  > > 3 - add extra nodes along long ways with few far-between nodes

Please do not add nodes to the OSM database for this purpose. It
provides no benefit to the OSM community.


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